Small Intestines

Question 1

What is functions of the small intestines

Answer 1

1. Digestion
2. Absorb nutrients
3. Produce intestinal hormones- using DNES cells

Question 2

What are the three surface adaptations for the small intestine by a factor of 400 plus

Answer 2

1. Placate circulares (valves of Kerckring): permanent folds affecting the mucosa and Submucosa; found throughout duodenum, jejunum and proximal ileum
2. Villi
3. Microvilliated- on the luminal cell surface

Question 3

What is the surface epithelium of the small intestines

Answer 3

Simple columnar

Question 4

What cell replaces other cells

Answer 4

Regenerative cells

Question 5

What are the surface absorptive cells

Answer 5

Enterocytes

Question 6

What promotes humoral immunity

Answer 6

M cells

Question 7

What produces lysozyme

Answer 7

Paneth cells

Question 8

What inhibits stomach activity

Answer 8

Secretin

Question 9

What stimulates the gallbladder

Answer 9

CCK

Question 10

Stimulates pancreas to release digestive enzyme

Answer 10

CCK

Question 11

Stimulates ducts in pancreas to release bicarbonate

Answer 11

Secretin

Question 12

What do enterocytes do in the mucosa of the small intestines

Answer 12

Contain microvilli that absorb@

Absorb water and nutrients

Question 13

Where is the terminal digestion at

Answer 13

Glycocalyx, cells produce the enzymes and absorb the monosaccharides and peptides

Question 14

where are goblet cells mc found in small intestine

Answer 14

Ileum and fewest in duodenum

Question 15

How many types of DNES cells are there in the small intestines

Answer 15

11

Question 16

Type I cells produce

Answer 16

CCK, stimulates gallbladder contraction and pancreatic secretion of enzymes from serous ACINI

Question 17

Type K cells do what

Answer 17

Produces GIP; which inhibits HCL release

Question 18

Type S cells produce

Answer 18

Secretin: stimulate pancreas secretion of bicarbonate from the pancreatic ducts; also will inhibit HCL release and the movement of chyme into small intestines

Question 19

Where are the regenerative cells located in the small intestine

Answer 19

In crypts

Question 20

Where are paneth cells located

Answer 20

Crypts (intestinal glands)

Produce lysozyme

Question 21

Where are M cells located

Answer 21

Ilieum epithelium over peyers patches

Question 22

What is the function M cells

Answer 22

Promote humoral immunity

Results in plasma cells producing IgA which is then transferred to epithelial cells and releases into gut lumen. Enterocytes